Rectangular Hollow sections conform to Kenya bureau of standards KS02-104.Hollow sec-tions are
manufactured on tube mills using high frequency induction welding technique. The strip is continuously
seam welded while round in shape and then gradually brought to the desired section in the sizing mill.
The welded seam is put to a greater amount of cold working while being sized. This is a very severe test
of strength of a seam weld and ensures that each length of hollow sections is welded for maximum